Looks great, Hugh, glad to read that it works, as advertised, too. Out of curiosity, was the agent a bicycle shop person, or did you speak with someone from SRAM? I imagine that they are most likely talking about the Force 22 RD being needed to achieve the true 22 gears. I looked at the Force 22, and the Rival 22, RDs, they look like adaptations of SRAM's MTB ders, to me.

Happy riding, the entire bike looks fantastic, Boardman has some sweet offerings.

Bill